when a friday falls on the 13th of the month
is thought to be unlucky and is associated with witches, dark spirits and back cats
as many unlucky things happen on this day as any other day of the year although we believe more occur because we are looking out for every little piece of "bad luck"

The day after Thanksgiving when the holidy/christmas shopping season starts. It is called Black Friday because it is on Friday and traditionally the day that retailers finances go in the black, i.e., become profitable. In the red, on other other hand, implies that a company is operating at a loss, i.e. unprofitable.

A sharp rise in profits from holiday sales pushed the firm in the black which is typically referred to as Black Friday in the retailing world.

The day after Thanksgiving when people who are dumber than shit wait in line for 3 hours at stores to save $5. These are the same fucking morons who think that all places except stores should close on this day, even though it is NOT a holiday.